Cavity Resonator Filter Tuning With a Movable Adjusting Bar
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently utilizing the spectrum due to limited frequency flexibility, which hampers the ability to maintain quality of service and meet growing demand.
Innovation Solution
A frequency adjustable filter is designed with a housing containing overlapping resonator elements and an adjusting bar, where the adjusting bar is moved by an actuator through a driving shaft to adjust the resonant frequency, allowing for precise tuning of the filter's response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed frequency filters are used, then the filter structure is simple, but the spectrum utilization efficiency is poor
Solution Approach 1:
The filter incorporates an adjustable resonator element that can be dynamically repositioned along the resonator structure, enabling the filter to adapt its resonant frequency according to different spectrum requirements. This dynamic adjustment mechanism transforms a static filter into a versatile frequency-selective device, directly addressing the spectrum utilization efficiency issue while maintaining reasonable structural complexity.
Solution Approach 2:
The invention changes the physical position parameter of the adjustable resonator element to modify the resonant frequency of the filter. By varying the position of the resonator element along the resonator structure, different frequency points can be selected, thereby achieving efficient spectrum utilization without requiring multiple fixed filters.
2Measurement precision
If frequency adjustable mechanism is added, then the resonant frequency can be precisely tuned, but the device complexity increases
Solution Approach 1:
The invention replaces complex mechanical adjustment systems with a simplified structure where the resonator element can be directly positioned and fixed. This mechanical simplification achieves precise frequency tuning without requiring elaborate drive mechanisms, motors, or control systems, thus maintaining device simplicity while enabling accurate resonant frequency adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient use of the spectrum by allowing for precise adjustment of resonant frequencies, enhancing the performance and adaptability of wireless communication systems to meet increasing demands.
Implementation Method 1
a first resonator element extending from the lid towards a bottom of the cavity... a second resonator element extending from the bottom towards the lid... an adjusting bar extending inside an area in which the first resonator element and the second resonator element are overlapping
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Arrangements for a frequency adjustable filter, which comprises at least a housing, which comprises one or more cavities closed by a lid above the housing are disclosed. In an arrangement, there is, per a cavity forming a resonator, a first resonator element extending from the lid, a second resonator element extending from the bottom, the second resonator element partially overlapping the first resonator element, an adjusting bar extending inside an area in which the first and the second resonator elements are overlapping, the adjusting bar being arranged to move within said area, a first hole either in the lid or in the bottom, a driving shaft, and an actuator arranged to move the adjusting bar through the first hole by means of the driving shaft. At least the first resonator element, the second resonator element and the adjusting bar are positioned to have a common vertical central axis.